Combined sand and water heater



Dec. 12, .5967 H. FLEMING COMBINED SAND AND WATER HEATER Filed Sept. 8.1965 INVENTOR Mo-u/md m ATTORNEY United States Patent 3,357,420 COMBINEDSAND AND WATER HEATER Howard B. Fleming, South Portland, Maine, assignorto Fleming Devices, Inc, South Portland, Maine, a corporation of MaineFiled Sept. 8, 1965, Ser. No. 485,801 3 Claims. (Cl. 126-350) ABSTRACTOF THE DISCLOSURE A sand and water heater with a tubular chamber to becovered with sand, closed at its ends, and having an eX- haust stack, awater tank having a loop conduit extending lengthwise of the chamber,and an oil burner of the gun type extending through one wall and havinga thermostatic control, the thermostat being responsive to the watertemperature.

The present invention relates to sand and water heater combinationsadapted to eliminate from cement construction work, particularly at thestart of a days work, during freezing weather the necessity of thawingsand and providing water for use in cement mixing.

The general objective of the invention is to provide a combined sand andWater heater that will be effective to ensure that a substantial supplyof unfrozen sand and an adequate volume of water for use therewith inmixing cement is available at the job and ready for use even if left inthe open and unattended overnight in freezing weather.

In accordance with the invention, the objective is attained withapparatus comprising a horizontal, tubular chamber to be covered withsand and having retaining walls closing its ends and dimensioned toextend above and laterally thereof. The chamber has an exhaust stackattached to and in communication with the interior of the chamberadjacent one wall. A Water tank is provided with a loop conduitextending through the other wall a substantial distance lengthwise ofthe upper part of the interior of the chamber. A heater for the chamberis Supported by said other wall and has a circuit provided with athermostat connected to the tank to be responsive to the temperature ofthe Water contained therein.

In the accompanying drawings, there is shown an illustrative embodimentof the invention from which these and other of its objectives, togetherwith its novel features and advantages, will be readily apparent.

In the drawings:

FIGURE 1 is a side view of the apparatus showing the chamber aslongitudinally and vertically sectioned,

FIGURE 2 is a section, on a reduced scale, taken approximately along theindicated lines 22 of FIGURE 1, and

FIGURE 3 is a section taken approximately along the indicated lines 33of FIGURE 1.

The heater illustrated by the drawings consists of a cylindrical chamberof substantial length, conveniently a length of corrugated pipe, closedat its ends by walls 11 and 12 welded thereto. Each wall extendslaterally of and above and below the chamber 10 so as to providesupports positioning the chamber 10 horizontally and providing retainersfor sand, generally indicated at S, deposited between them and coveringthe chamber 10. The chamber 10 has a centrally located eye 13 and isalso provided with member 14, each welded to a wall and to the chamber10 to provide eyes, the several eyes being used in hoisting the heaterinto and out of positions of use at the job. The chamber 10 also has,adjacent its wall 11, a stack 15 in communication with the interiorthereof and extending vertically above the walls 11 and 12 so as to beexposed when the heater is covered with sand.

The wall 12 has a port opening into the chamber 10 closed by a plate 16having a port 16a controlled by a hinged damper 16b. A flanged sleeve 17to which is bolted a flanged sleeve 18 opens into the chamber 10. Thebarrel 19 of a generally indicated oil burner unit 20 extends throughthe sleeves and into the chamber 10 to the desired extent. The oilsupply for the oil burner unit 20 is not shown but it may be attached tothe heater or it may be an existing source of supply or a portable tank.

Supporting arms 21 and 22 are secured to the wall 12 and these armssupport a water barrel 23 having a generally indicated loop 24 extendingthrough the wall 12 and into the chamber 10 with its closed end 24aadjacent the stack 15. The upper arm 24b is supported approximatelyhorizontally in the chamber 19 by hangers 10a and is in communicationwith the interior of the barrel 23 centrally thereof while the lower arm240 is downwardly inclined and is in communication with the interior ofthe barrel close to the bottom thereof. An adjustable thermostat 25 isconnected in a loop 26 to be responsive to the temperature of the waterin the barrel 23 and controls the operating circuit 27 of the oil burnerunit.

It will be apparent, from the foregoing, that when the chamber 10 iscovered with sand and the water barrel 23 is full of water, the burnerunit is operated whenever the temperature of the water therein drops toa predetermined minimum thereby to prevent its freezing. The sameoperation ensures that the sand will be so heated that it may be usedwhenever needed in mixing a supply of cement.

I claim:

1. A combined sand and water heater comprising a horizontal, tubularchamber to be covered with the sand to be heated and kept warm, a wallclosing each end of said chamber, at least one wall extending above andlaterally of the chamber to constitute a sand retaining wall, an exhauststack in communication with the interior of said chamber remote fromsaid one wall, a water tank having a loop conduit extending through saidwall a substantial distance lengthwise of the upper part of the interiorof said chamber, and an oil burner of the gun type with its barrelextending into said chamber through said one wall and having a controlcircuit provided with a thermostat, said thermostat being connected tosaid water tank to be responsive to the temperature of the water thereinwhereby the rate of sand heating is determined by the rate at which thewater cools.

2. The sand heater of claim 1 in which the sand retaining wall has asleeve opening into the chamber and the barrel of the oil burner extendsthrough and is supported by the sleeve thereby to support the oilburner.

3. The sand heater of claim 1 and a support secured to the sandretaining wall adjacent the bottom thereof and one side thereof, and thewater tank is mounted on the support.

(References on following page) References Cited UNITED STATES PATENTSFreeman 263-29 Cummings 126362 Cotton 126347 Hulme 126344 Koehn 126--362Long 126362 4 Tuttle 220--1.5 Lintz 220-,1.5 X Holmes 126-362 Bryden126344 White 126-2712 JAMES W. WESTHAVER, Primary Examiner.

ROBERT A. DUA, Examiner.

1. A COMBINED SAND AND WATER HEATER COMPRISING A HORIZONTAL, TUBULARCHAMBER TO BE COVERED WITH THE SAND TO BE HEATED AND KEPT WARM, A WALLCLOSING EACH END OF SAID CHAMBER, AT LEAST ONE WALL EXTENDING ABOVE ANDLATERALLY OF THE CHAMBER TO CONSTITUTE A SAND RETAINING WALL, AN EXHAUSTSTACK IN COMMUNICATION WITH THE INTERIOR OF SAID CHAMBER REMOTE FROMSAID ONE WALL, A WATER TANK HAVING A LOOP CONDUIT EXTENDING THROUGH SAIDWALL A SUBSTANTIAL DISTANCE LENGTHWISE OF THE UPPER PART OF THE INTERIOROF SAID CHAMBER, AND AN OIL BURNER OF THE GUN TYPE WITH ITS BARRELEXTENDING INTO SAID CHAMBER THROUGH SAID ONE WALL AND HAVING A CONTROLCIRCUIT PROVIDED WITH A THERMOSTAT, SAID THERMOSTAT BEING CONNECTED TOSAID WATER TANK TO BE RESPONSIVE TO THE TEMPERATURE OF THE WATER THEREINWHEREBY THE RATE OF SAND HEATING IS DETERMINED BY THE RATE OF WHICH THEWATER COOLS.